MCQ
The angle between an incident ray and the plane mirror is 30°. The total angle between the incident ray and reflected ray will be:
- A30°
- B60°
- C90°
- D120°
✓
Answer
- 120°
Explanation:
Since, angle of incidence = 90° - angle between plane mirror and incident ray = 90° - 30° = 60° and according to first law of reflection, angle of incidence = angle of reflection = 60°
Total angle between incident ray and reflected ray = 60° + 60° = 120°
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